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There are two thermal reservoirs: the hot reservoir is at 1200 K and the cold reservoir is at 600 K. If you wanted to transfer 100 kJ from on reservoir to the other, what would the change in entropy of the two reservoirs be?
a 0.25kg block is held compressed 0.1m against a spring k1000nm. what is the max height of the block after it is
a 3000lb car is traveling at 60mih up an inclined surface of 5deg when the brakes are applied creating a constant
a sociologist wishes to determine whether there is a relationship between the sex of a person and the amount of alcohol
a double acting cylinder with a single rod must produce a thrust of 80kn and move out with a velocity of 3mms on the
a carnot heat engine operates between 40c and 320 c. what is the thermal efficiency? if the work output is 200 kjkg
if a 1 micro-coulomb charge is next to a 4 micro-coulomb charge the magnitude of the repulsive force on the 1
an injected slug of tracer material flows with its carrier fluid down a long straight pipe in dispersed plug flow. at
construct a 99 confidence interval estimate of the mean of the differences between volumes for the first born and the
1. calculate the percent of the total resistance for external diffusion internal diffusion and surface reaction.2.
if a neutral metal sphere is connected to ground through a wire when a positively charged glass rod comes close to the
a load of 500 pounds is placed on a cylinder of 1040 carbon steel with a 2 inch radius. calculate the stress in
a dragster weighing 7120n attains a speed of 430km in the quarter mile.immediately after passing through the timing
A new cast iron pipe is 5 km long and 15 mm diameter is used to convey water at a rate of 0.0150m3s-1. Given the absolute roughness of the pipe is 0.26 mm, density of water is 998 kg/m3 and dynamic viscosity of water is 1.14 × 10-3 kgm 1s-1.
a 10 kg slab of cr-v steel at 900 c is to be quenched by immersing in a vessel of water. assume the slab exhibits a
Two slender rods of negligible weight are pin-connected at A and attached to the 18-lb block B and the 80-lb block C as shown. The coefficient of static friction is 0.55 between all surfaces of contact. Determine the range of values of P for which..
suppose you needed to reduce the diameter of a rod 20 and could choose between drawing it or extruding it through the
air enters a compressor at 179 kpa and 290 k and exits at a temperature of 500.9 k. determine the power kw for the
a mummy picks up a calculator and starts adding odd whole numbers together in order 135....etc. what will be the last
saturated steam at 2 mpa is contained in a piston-cylinder device. the initial volume is 0.25 cubic meters. heat is
water flows through the horizontal y-fitting shown in figure p3.101. if the flowrate and pressure in pipe1 are q1 2.3
do you think the objects created in the following representation schema are always valid? justify your answers with
a closed feedwater heater for a steam power plant operates as shown in the figure below. high-pressure liquid water at
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